package com.sky.service.impl;

import com.sky.dto.GoodsSalesDTO;
import com.sky.entity.Orders;
import com.sky.mapper.OrderMapper;
import com.sky.mapper.UserMapper;
import com.sky.service.ReportService;
import com.sky.service.WorkspaceService;
import com.sky.vo.*;
import org.apache.commons.lang.StringUtils;
import org.apache.poi.xssf.usermodel.XSSFRow;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.InputStream;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.LocalTime;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

@Service
public class ReportServiceImpl implements ReportService {
    @Autowired
    private OrderMapper orderMapper;
    @Autowired
    private UserMapper userMapper;
    @Autowired
    private WorkspaceService workspaceService;

    @Override
    public TurnoverReportVO turnoverStatistics(LocalDate begin, LocalDate end) {
        //将要查询的时间周期定义为一个集合
        List<LocalDate> dateList = new ArrayList<>();
        dateList.add(begin);
        //一直添加到最后一天
        while (!begin.equals(end)) {
            //begin后一天
            begin = begin.plusDays(1);
            dateList.add(begin);
        }

        List<Double> turnoverList = new ArrayList<>();
        for (LocalDate date : dateList) {
            //The minimum supported LocalTime, '00:00'. This is the time of midnight at the start of the day.
            LocalDateTime beginTime = LocalDateTime.of(date, LocalTime.MIN);
            //The maximum supported LocalTime, '23:59:59.999999999'. This is the time just before midnight at the end of the day.
            LocalDateTime endTime = LocalDateTime.of(date, LocalTime.MAX);
            Map map = new HashMap();
            map.put("status", Orders.COMPLETED);
            map.put("beginTime", beginTime);
            map.put("endTime", endTime);
            //查询指定条件下所有的营业额
            Double turnover = orderMapper.sumByMap(map);
            if (turnover == null) {
                turnover = 0.0;
            }
            turnoverList.add(turnover);
        }

        //数据封装
        return TurnoverReportVO.builder()
                .dateList(StringUtils.join(dateList, ","))
                .turnoverList(StringUtils.join(turnoverList, ","))
                .build();
    }

    @Override
    public UserReportVO getUserStatistics(LocalDate begin, LocalDate end) {
        //将要查询的时间周期定义为一个集合
        List<LocalDate> dateList = new ArrayList<>();
        dateList.add(begin);
        //一直添加到最后一天
        while (!begin.equals(end)) {
            //begin后一天
            begin = begin.plusDays(1);
            dateList.add(begin);
        }
        //新增用户数
        List<Integer> newUserList = new ArrayList<>();
        //总用户数
        List<Integer> totalUserList = new ArrayList<>();
        for (LocalDate date : dateList) {
            //The minimum supported LocalTime, '00:00'. This is the time of midnight at the start of the day.
            LocalDateTime beginTime = LocalDateTime.of(date, LocalTime.MIN);
            //The maximum supported LocalTime, '23:59:59.999999999'. This is the time just before midnight at the end of the day.
            LocalDateTime endTime = LocalDateTime.of(date, LocalTime.MAX);
            Map map = new HashMap();
            map.put("endTime", endTime);
            //先查询所有 select count(id) from user where  create_time < endTime
            Integer totalUser = userMapper.countByMap(map);
            if (totalUser == null) {
                totalUser = 0;
            }
            map.put("beginTime", beginTime);
            //再查询新增 select count(id) from user where  create_time > beginTime and create_time < endTime
            Integer newUser = userMapper.countByMap(map);
            if (newUser == null) {
                newUser = 0;
            }
            newUserList.add(newUser);
            totalUserList.add(totalUser);
        }

        //数据封装
        return UserReportVO.builder()
                .dateList(StringUtils.join(dateList, ","))
                .newUserList(StringUtils.join(newUserList, ","))
                .totalUserList(StringUtils.join(totalUserList, ","))
                .build();
    }

    @Override
    public OrderReportVO ordersStatistics(LocalDate begin, LocalDate end) {
        //将要查询的时间周期定义为一个集合
        List<LocalDate> dateList = new ArrayList<>();
        dateList.add(begin);
        //一直添加到最后一天
        while (!begin.equals(end)) {
            //begin后一天
            begin = begin.plusDays(1);
            dateList.add(begin);
        }
        //订单数列表
        List<Integer> orderCountList = new ArrayList<>();
        //有效订单数列表
        List<Integer> validOrderCountList = new ArrayList<>();
        //有效订单数
        Integer validOrderCount = 0;
        //总订单数
        Integer totalOrderCount = 0;
        for (LocalDate date : dateList) {
            //The minimum supported LocalTime, '00:00'. This is the time of midnight at the start of the day.
            LocalDateTime beginTime = LocalDateTime.of(date, LocalTime.MIN);
            //The maximum supported LocalTime, '23:59:59.999999999'. This is the time just before midnight at the end of the day.
            LocalDateTime endTime = LocalDateTime.of(date, LocalTime.MAX);
            Map map = new HashMap();
            map.put("beginTime", beginTime);
            map.put("endTime", endTime);
            //查询指定条件下订单数列表
            Integer orderCount = orderMapper.countByMap(map);
            map.put("status", Orders.COMPLETED);
            //查询指定条件下有效订单数列表
            Integer validOrderCount1 = orderMapper.countByMap(map);
            if (orderCount == null) {
                orderCount = 0;
            }
            if (validOrderCount1 == null) {
                validOrderCount1 = 0;
            }
            totalOrderCount += orderCount;
            validOrderCount += validOrderCount1;
            orderCountList.add(orderCount);
            validOrderCountList.add(validOrderCount1);
        }

        //订单完成率 有效订单数 / 总订单数 * 100%
        Double orderCompletionRate = 0.0;
        if (totalOrderCount != 0) {
            orderCompletionRate = validOrderCount.doubleValue() / totalOrderCount;
        }

        //数据封装
        return OrderReportVO.builder()
                .dateList(StringUtils.join(dateList, ","))
                .orderCompletionRate(orderCompletionRate)
                .totalOrderCount(totalOrderCount)
                .validOrderCount(validOrderCount)
                .orderCountList(StringUtils.join(orderCountList, ","))
                .validOrderCountList(StringUtils.join(validOrderCountList, ","))
                .build();
    }

    @Override
    public SalesTop10ReportVO getSalesTop10(LocalDate begin, LocalDate end) {
        //The minimum supported LocalTime, '00:00'. This is the time of midnight at the start of the day.
        LocalDateTime beginTime = LocalDateTime.of(begin, LocalTime.MIN);
        //The maximum supported LocalTime, '23:59:59.999999999'. This is the time just before midnight at the end of the day.
        LocalDateTime endTime = LocalDateTime.of(end, LocalTime.MAX);
        List<GoodsSalesDTO> goodsSalesDTOList = orderMapper.getSalesTop10(beginTime, endTime);

        String nameList = StringUtils.join(goodsSalesDTOList.stream().map(GoodsSalesDTO::getName).collect(Collectors.toList()), ",");
        String numberList = StringUtils.join(goodsSalesDTOList.stream().map(GoodsSalesDTO::getNumber).collect(Collectors.toList()), ",");

        return SalesTop10ReportVO.builder()
                .nameList(nameList)
                .numberList(numberList)
                .build();
    }

    public void exportBusinessData(HttpServletResponse response) {
        LocalDate begin = LocalDate.now().minusDays(30);
        LocalDate end = LocalDate.now().minusDays(1);
        //查询概览运营数据，提供给Excel模板文件
        BusinessDataVO businessData = workspaceService.getBusinessData(LocalDateTime.of(begin, LocalTime.MIN), LocalDateTime.of(end, LocalTime.MAX));
        InputStream inputStream = this.getClass().getClassLoader().getResourceAsStream("template/运营数据报表模板.xlsx");
        try {
            //基于提供好的模板文件创建一个新的Excel表格对象
            XSSFWorkbook excel = new XSSFWorkbook(inputStream);
            //获得Excel文件中的一个Sheet页
            XSSFSheet sheet = excel.getSheet("Sheet1");
            sheet.getRow(1).getCell(1).setCellValue(begin + "至" + end);
            //获得第4行
            XSSFRow row = sheet.getRow(3);
            //获取单元格
            row.getCell(2).setCellValue(businessData.getTurnover());
            row.getCell(4).setCellValue(businessData.getOrderCompletionRate());
            row.getCell(6).setCellValue(businessData.getNewUsers());
            row = sheet.getRow(4);
            row.getCell(2).setCellValue(businessData.getValidOrderCount());
            row.getCell(4).setCellValue(businessData.getUnitPrice());
            for (int i = 0; i < 30; i++) {
                LocalDate date = begin.plusDays(i);
                //准备明细数据
                businessData = workspaceService.getBusinessData(LocalDateTime.of(date, LocalTime.MIN), LocalDateTime.of(date, LocalTime.MAX));
                row = sheet.getRow(7 + i);
                row.getCell(1).setCellValue(date.toString());
                row.getCell(2).setCellValue(businessData.getTurnover());
                row.getCell(3).setCellValue(businessData.getValidOrderCount());
                row.getCell(4).setCellValue(businessData.getOrderCompletionRate());
                row.getCell(5).setCellValue(businessData.getUnitPrice());
                row.getCell(6).setCellValue(businessData.getNewUsers());
            }
            //通过输出流将文件下载到客户端浏览器中
            ServletOutputStream out = response.getOutputStream();
            excel.write(out);
            //关闭资源
            out.flush();
            out.close();
            excel.close();
        } catch (IOException e) {
            e.printStackTrace();
        }

    }
}
